如果定义函数计算调和级数之和;series::Int-Float用series n表示[img=242x25]1803c461290438b.png[/img]，那么如何用series 表示[img=191x25]1803c46130ff710.png[/img]？
A: series n-1
B: series (n-1)
C: series 1 + series 2 + ... + series (n-1)
D: series (1+1/2+..+ 1/n-1)
A: series n-1
B: series (n-1)
C: series 1 + series 2 + ... + series (n-1)
D: series (1+1/2+..+ 1/n-1)
举一反三
- The time series is mainly divided into absolute number time series, relative number time series and ( ). A: Period series B: Time-point series C: Chronological series D: Average time series
- 11. 设函数$f(x)=({{\text{e}}^{x}}-1)({{\text{e}}^{2x}}-2)\cdots ({{\text{e}}^{nx}}-n)$，其中$n$为正整数，则${f}'(0)=$（ ）。 A: ${{(-1)}^{n-1}}(n-1)!$ B: ${{(-1)}^{n}}(n-1)!$ C: ${{(-1)}^{n-1}}n!$ D: ${{(-1)}^{n}}n!$
- A(n) ________ is a domestic series that goes on week after week.
- Piers the Plowman describes a series of ...n primitive England.
- 函数$y=\ln x$的$n$阶导数为 A: $\frac{(n-1)!}{x^n}$ B: $\frac{n!}{x^n}$ C: $(-1)^{n-1}\frac{(n-1)!}{x^n}$ D: $(-1)^n\frac{(n-1)!}{x^n}$